Electricity: motor control systems – Closed loop speed control system for dc motor with commutator – Armature control by digital or combined analog and digital...
Reexamination Certificate
2007-11-20
2007-11-20
Masih, Karen (Department: 2837)
Electricity: motor control systems
Closed loop speed control system for dc motor with commutator
Armature control by digital or combined analog and digital...
C388S812000, C388S813000, C388S814000, C318S139000
Reexamination Certificate
active
11111389
ABSTRACT:
A method of interfacing an electromagnetic sensor with a controller in a motor control system, the method including: applying an excitation signal to the electromagnetic sensor; receiving a first electromagnetic sensor output signal based on the excitation signal, the first electromagnetic sensor signal comprising an amplitude modulated signal corresponding to a position of a rotor of the electromagnetic sensor; and receiving a second electromagnetic sensor output signal based on the excitation signal, the second electromagnetic sensor signal comprising another amplitude modulated signal corresponding to the position of the rotor of the electromagnetic sensor. The method also includes sampling the first electromagnetic sensor signal and the second electromagnetic sensor signal at about an instance synchronous with the excitation signal to demodulate the first electromagnetic sensor signal and the second electromagnetic sensor signal and decoding a resultant of the sampling to identify the position of a rotor of the electromagnetic sensor.
REFERENCES:
patent: 6719089 (2004-04-01), Yoneda et al.
patent: 6754610 (2004-06-01), Dudler et al.
patent: 2004/0130442 (2004-07-01), Breed et al.
Chen Shaotang
Mir Sayeed A.
Ross Christian
Sebastian Tomy
Wong Tom C.
Delphi Technologies Inc.
Masih Karen
Smith Michael D.
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